Power-hammer



(No Model.)

W. R. JENKINS, Jr.

POWER HAMMER.

No. 370,260. Patented Sept. 20, 1887.

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Il, A uw] 1 e# Ntra STATES,

VILLIAM R. JENKINS, JR., OF BELLEFONTE, PENNSYLVANIA.

POWER-HAMMER."

SPECIFICATION forming part of Letters Patent No. 370,260, datedSeptember 20l 1887,

Application filed February 4, 18e?. Serial No. 226,558.

To all whom it may concern.-

Be it known that I, WILLIAM R. JENKINS, Jr., a citizen of the UnitedStates, residing at Bellefonte, in the county of Centre and State ofPennsylvania, have invented certain new and useful Improvements inPower-Hammers; and I do hereby declare the following to be a full,clear, and exact description of theinvention, which will enable othersskilled in the art to which it appertains to make and use the same.

The object of my present improvements in power-hammers is to provide abetter fulcrum for the helve and a better connection between the helveand the ram, so that there shall be more elasticity and freedom ofmovement at these points, and consequently a more perfect action of theparts and a complete relief from the severe jar incident to the blow ofthe hammer. My invention therein consists, mainly, in the constructionof the helve, in the manner of mounting the same, and in the manner ofattaching it to the ram, together' with other details of constructionand arrangement, all as willbe more fully hereinafter described andclaimed.

For a better understanding of my improvements, attention is invited tothe accompany ing drawings,wherein like letters of reference denotecorresponding parts, and in which- Figure l is a side elevation of myimproved power-hammer; Fig. 2, a front elevation of the parts comprisingthe fulerum of the helve,and Fig. 3 a plan view of the helve.

The frame is made, preferably, of two parts bolted together, Arepresenting the base, which supports the anvil and drivingmechanism,and A the top,which supports the helve and ram.

VThis upper portion, A', of the frame is provided at its front end withthe usual vertical guide, B, for the ram a to move in, and has on itsback end two open uprights, C C, which support a cross-head, D, betweenfour elastic vision is necessary at the fulcrum.

(No modeLl blow of the hammer. The tension of these cushions can beregulated and adjusted by means of the bolts c c passing up through themand the ends of the cross-head.

The helve is composed of the main body F, provided with the central hub,f, for the fulerum-pin, and with the forked rear end and pin f forconnection with the driving-rod from the crankshaft. To the forward endof this hel ve are secured two flat bars of spring-steel, G G, each bentoutward in the form of a semicircle, and both together forming acomplete circle. The ends of these springs, together with the ends of aflexible strap, H, between them, are secured together by ferruled boltsh h. This strap H is composed, preferably,of several plies orthicknesses of leather or rawhide, and passes through a slot or opening,a', in the upper end of the ram a. In practice this connection ofthehelve with the ram relieves the machine from the severe jar incident toits workthat is, the springs G G yielding slightly, in conjunction withthe action of the cushions at the fulcrum of the helve, adds greatlytoits elasticity, and the strap tting loosely in the slot or opening inthe ram permits of its vertical movement, so that no pro.

The fulcrum-pin being a part of the cross-head, it partakes of anymovement that the latter receives. The vertical movement of thecross-head is limn ited by the elasticity of the cushions (between whichit is held) and the speed at which the hammer is driven, and the helve,being pivoted thereto, partakes of the same movement, (at this point,)which is multiplied many times at the ram.

VhatI claim, and desire to secure by'Letters Patent, is

l. A helve for power-hammers, adapted at one end to be connected to thedriving mechanism, and provided at the opposite end with twosemicircular springs, and with a flexible strap secured between the endsof said springs by means of ferruled bolts, substantially as described.

2. ,An oscillating helve for powerhammers, provided with a central hubfor mounting it, with a pin at one end for connecting it with the rodfrom the crank-shaft, and with ailexible strap at the other secured byferruled bolts IOO between the ends of two semicircular springs,substantially as'deseribed and shown.

3. A power-hammer having an oscillating helve pivoted in a cross-headmounted between and held in place by elastic cushions, substantially asdescribed.

4. A power-hammer having an oscillating helvepivoted in a crossheadmounted between and held in place by elastic'cushionsand provided with aflexible strap passing through a slot in the upper end of the ram andsecured between the ends of two semicircular springs, substantially asdescribed and shown.

5. In a power-hammer, an oscillating helve connected at one end to theram by a flexible strap secured between two semicireular springs Vof thehelve, and connected at the other end to the rod from the crankshaft,and pivoted intermediate these points in a cross-head mounted betweenelastic cushions, substantially as described.

6. In a power-hammer, the combination, with the frame, of the twouprights C C, the elastic cushions E E, the cross-head D, mountedbetween said cushions and provided with pockets d d to receive the same,and the oscillating helve F, pivoted in said cross-head, substantiallyas described. l

' 7. In a power-hammer, the combination, with the frame, of the twouprights C C, the four elastic cushions E E, the cross-head D, providedwith the pin D and pockets d d, the helve F, mounted upon said pin, andthe bolts c c, substantially as described.

In testimony whereof I afix my signature in presence of two witnesses.

WILLIAM R. JENKINS, J R.

Witnesses:

J. H. LINGLE, J.. L. MONTGOMERY.

